Currently, it is not well understood how young people in Low and Middle-Income Countries (LMICs) access health services such as primary care and mental health services, which are easier to access in other parts of the world. Since adolescents are a significant, unique population in these countries, there is evidence to suggest that health services need distinct features and considerations to be adolescent-friendly and responsive. However, there is no universal, comprehensive definition of adolescent-friendly health services. To fill this gap in the body of knowledge, we are conducting a systematic review to collate, synthesize and identify the barriers and facilitators of adolescent-responsive health services. We worked closely with a research librarian to perform a robust search through a range of databases (CAB Direct, CINAHL, Cochrane, Embase, Global health Medicus, PsychINFO, and PubMed) which resulted in 4751 unique abstracts. During the title and abstract screening, two members of the team reviewed each article. Currently, 171 articles have been selected for full-text screening to confirm they are appropriate for inclusion and for analysis. Next, we will create a narrative synthesis of the features of service, keywords, factors, and outcomes identified. The research will provide a clear, comprehensive definition of adolescent-responsive health care and services in LMICs. This information will be particularly useful to international organizations, like the UN, healthcare providers, and policymakers as it will inform new programs, initiatives, or guidelines to improve the quality of adolescent health services in LMICs.